How to use the registry-js.RegistryValueType.REG_EXPAND_SZ function in registry-js

)

  if (powerShell.length === 0) {
    return null
  }

  const first = powerShell[0]

  // NOTE:
  // on Windows 7 these are both REG_SZ, which technically isn't supposed
  // to contain unexpanded references to environment variables. But given
  // it's also %SystemRoot% and we do the expanding here I think this is
  // a fine workaround to do to support the maximum number of setups.

  if (
    first.type === RegistryValueType.REG_EXPAND_SZ ||
    first.type === RegistryValueType.REG_SZ
  ) {
    const path = first.data.replace(
      /^%SystemRoot%/i,
      process.env.SystemRoot || 'C:\\Windows'
    )

    if (await pathExists(path)) {
      return path
    } else {
      log.debug(
        `[PowerShell] registry entry found but does not exist at '${path}'`
      )
    }
  }